What I really like about the IBM 3270 emulator is that it is interactive so you get to watch where your script gets stuck and you can also easily inspect what your script sees when it makes decisions.
I have a nicely wrapped 3270 library, but I developed it for $work so I'm not really sure that I can release it onto the CPAN even though the "main" 3270 application just got decommissioned. But the successor application also got 3270 access because deep down it still runs on an IBM host+database, so the framework will still stay in place, just in case the fancy new web interface (or XML interface) doesn't work out...
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